– يَا مُقَلِّبَ الْقُلُوْبِ ثَبِّتْ قَلْبِيْ عَلٰ دِيْنِكَ

We should always be alert to the horrible possibility that our hearts turn away from the religion under the influence of Shaytan or our own inclinations towards evil. That is why we seek Allah’s help against that. It is reported by Um Salamah (ra) that the Prophet (sallallahu alayhi wa sallem) used to make this du’aa very frequently.